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x in (-oo:+oo)
6*(2*x-2) = 12 // - 12
6*(2*x-2)-12 = 0
6*(2*x-2)-12 = 0
12*x-24 = 0
12*x-24 = 0
12*x-24 = 0 // + 24
12*x = 24 // : 12
x = 24/12
x = 2
x = 2
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